Islam in Africa is the continent's second most widely professed faith behind Christianity. Africa was the first continent into which Islam spread from Southwest Asia, during the early 7th century CE. Almost one-third of the world's Muslim population resides in Africa. Muslims crossed current Djibouti and Somalia to seek refuge in present-day Eritrea and Ethiopia during the Hijrah ("Migration") to the Christian Kingdom of Aksum. Like the vast majority (90%) of Muslims in the world, most Muslims in Africa are also Sunni Muslims; the complexity of Islam in Africa is revealed in the various schools of thought, traditions, and voices in many African countries. Many African ethnicities, mostly in North, West and East Africa consider Islam their Traditional religion. The practice of Islam on the continent is not static and is constantly being reshaped by prevalent social, economic, and political conditions. Generally Islam in Africa often adapted to African cultural contexts and belief systems forming Africa's own orthodoxies.

Muslims are people who adhere to Islam, a monotheistic religion belonging to the Abrahamic tradition. They consider the Quran, the foundational religious text of Islam, to be the verbatim word of the God of Abraham as it was revealed to Muhammad, the main Islamic prophet. Alongside the Quran, Muslims also believe in previous revelations, such as the Tawrat (Torah), the Zabur (Psalms), and the Injeel (Gospel). These earlier revelations are associated with Judaism and Christianity, which are regarded by Muslims as earlier versions of Islam. The majority of Muslims also follow the teachings and practices attributed to Muhammad (sunnah) as recorded in traditional accounts (hadith).